Build failed. https://zuul.opendev.org/t/openstack/buildset/36d4674b78854e6fabd8c38217e2d2b1 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b30490cb9eb34f058c2e902e93192c1b : SUCCESS in 4m 33s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c077a258866c47eeb853c9d9887dcfdf : SUCCESS in 4m 31s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5ad6cf0a69d5469cb7e6845fd7c9a1fa : SUCCESS in 4m 05s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f2826291c447429f9ca32cc8af9de006 : FAILURE in 4m 11s